Bunn DUAL - Warmer Element Service; Warmer Element Test Procedures; Warmer Element Removal and Replacement

Page 44
SERVICE (cont.)
WARMER ELEMENTS
!
CAUTIO
N
HO
T WATER
.
MINU
T
ES
BUNN-O-
MATIC
P/N 2
620
- 120 VAC
.
MINUTES
BUNN-O-MATIC
P/N 2620- 120 VAC
START
ON / WA
RMER
SELECTOR
READY
R
E
ADY
ON / WARMER
START
1
1
⁄2
gal
1
ga
l
1⁄
2
ga
l
SE
L
E
C
T
O
R
1
1⁄2
gal
1
gal
1⁄2
gal
CAUTIO N:
WARM ERS AND
SURFA
C
E
S
A
RE
HOT
Location:
The warmer element(s) are located in the base of
the brewer under the warmer plate.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Using the white wire in the terminal block and the
white/red wire to left warmer (Dual Brewers) or
the white/violet wire to warmer (Single Brewers)
or right warmer (Dual Brewers) check the voltage.
With a voltmeter, check voltage across the white
and white/red wire or the white wire and white/
violet wire with the "ON/OFF" switch in the "ON"
position. The indication must be 120 volts ac for
two wire 120 volt models, three wire 120/208 volt
models and three wire 120/240 volt models.
3. With a voltmeter, check the voltage across the red
wire and white/red wire or red wire and white/violet
wire with the "ON/OFF" switch in the "ON" position.
The indication must be 200 to 240 volts ac for two
wire 200 or 240 volt models.
4. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to the Wiring
Diagrams and check brewer wiring harness.
5. Check the continuity across the two terminals on
the warmer element(s).
If continuity is present as described, reconnect the
wires to the warmer element(s).
If continuity is not present as described, replace the
warmer element(s).
Removal and Replacement:
1. Remove the three #4-40 slotted head screws se-
curing the warmer assembly to the brewer base.
2. Lift the warmer assembly from the brewer base.
3. Disconnect the two wires from the warm element
terminals.
4. Remove the two #8-32 nuts securing the warmer
element to the warmer plate.
5. Securely install new warmer element.
6. Reconnect the two wires to warmer element ter-
minals.
7. Securely install warmer assembly in brewer
base.
8. Reconnect the two wires to the warmer element.
P796
FIG. 49 WARMER ELEMENTS
41976 031709